The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
Earthquake in New Zeeland
by RODALCO
11/27/16 11:25 PM
Calling all Non-US members!! (Non-US only)
by Tjia1981
11/27/16 06:33 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
Trumpy 8
sparkyinak 7
Who's Online
0 registered (), 99 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#206674 - 07/30/12 08:41 PM RV outlets
schenimann Offline
Member

Registered: 02/18/08
Posts: 194
Loc: Western North Carolina
Our church is wanting to put in some 50 and 30amp outlets for RVs. We have singing groups that bring their large busses and need a hookup so they don't have to run their gens for 2-3 days.

The panels are 208/120 and I need 120/240. Can I use the 208v to operate these outlets or do I need to change it to 240. I understand that many 240v motors have run on 208 for years. What's the best thing to do?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#206676 - 07/31/12 12:57 AM Re: RV outlets [Re: schenimann]
Tesla Offline
Member

Registered: 06/16/04
Posts: 1280
Loc: Sacramento, CA
Don't sweat nothing.

The VAST bulk of the true loads are 120VAC...

Only a fraction of the RV load uses two poles: air conditioning in the larger sizes.

So...

Hook up 208Y120 as if it were 240/120 and all will be well.

( No RV uses electric power for hot water at 240VAC, nor do any use electric ranges, etc. )
_________________________
Tesla

Top
#206683 - 07/31/12 02:06 PM Re: RV outlets [Re: schenimann]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
Heating elements are not a concern anyway. They just heat less.
The AC units are the heavy hitter in an RV.

Maybe a peek at a few RV manufacturer specs would answer the question.
_________________________
Greg Fretwell

Top
#206687 - 07/31/12 02:23 PM Re: RV outlets [Re: schenimann]
EV607797 Offline
Member

Registered: 10/25/06
Posts: 756
Loc: Fredericksburg, VA, USA
I can say with certainty that I've been to many RV parks that use 120/208 Wye services and distribute from there. I really don't think you'll have any trouble at all.

My friend has a motor coach RV that has an electric cooktop in it that only uses a 120 volt circuit, as does the washer/dryer combo. I'm with Tesla: You probably won't see many 240 volt loads, if at all in an RV.
_________________________
---Ed---

"But the guy at Home Depot said it would work."

Top
#206694 - 07/31/12 09:23 PM Re: RV outlets [Re: schenimann]
WESTUPLACE Offline
Member

Registered: 03/29/04
Posts: 252
Loc: Kingwood, TX USA
I have worked on lots of RVs Most all but the very largest (and most expensive) use 120v for everything just divided across 2 ckts a very few use dryers that are 240v and fewer use 240V AC units. Most all rooftop AC units are 120v. I see no problem using 120/208.

Top
#206887 - 08/24/12 04:50 PM Re: RV outlets [Re: schenimann]
sabrown Offline
Member

Registered: 12/12/02
Posts: 297
Loc: Ogden, Utah, USA
If you have a handbook look at 2011 NEC 551.40(A). It basically says that equipment be rated 208-230 to allow for 208Y/120 distribution.

Shane

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals